When comparing KiTTY vs Konsole, the Slant community recommends Konsole for most people. In the question“What are the best Linux terminal emulators?”Konsole is ranked 9th while KiTTY is ranked 14th. The most important reason people chose Konsole is:

Konsole can bookmark ssh and telnet sessions, directories, and it can open tabs in a folder for easy access.

Pro

Can store login credentials

Pro

Startup sessions

Support start-up sessions which allow you to specify the window/tab layout, working directories, and programs to run on startup.

Pro

True Color support

Supports True Color, so software like Vim can display a really nice pallet.

Pro

Unicode

Uses Unicode for the best character compatibility.

Pro

Directory and SSH bookmarking

Konsole can bookmark ssh and telnet sessions, directories, and it can open tabs in a folder for easy access.

Pro

Supports split-view

Konsole supports split-view which splits the window into two (or more) konsole instances. This is very useful for people who work a lot on the terminal and don't want to spend time navigating between different windows or tabs.

Pro

Notification alerts about activity in a terminal

Konsole can monitor activities and notify the user through system notifications when a certain activity happens. This is a very customizable feature too: you can write scripts that can use this feature and notify you for whatever you want.

Pro

Export of output in plain text or HTML format

By going to file > save output, you can send all screen output to a text file.

Pro

Customize and save profiles

Profiles containing different settings can be created, saved, and loaded. Color schemes, window transparency, scroll bar, key bindings, start-up commands, window border, and menu bar can all be customized according to the user's needs.

Pro

Support in Dolphin file manager

Konsole can be accessed by pressing F4 in Dolphin, which is convenient for when the user needs to open the terminal in a particular spot of the file structure.

Pro

Exceptionally fast

Konsole is usually very fast. It boots up very quickly and takes less than a second (averages to 0.25-0.59 seconds) to display files of up to 600 MB.

Pro

Embeddable into the desktop

Konsole can be embedded into desktop so it's always easily accessible, but not in the way of other windows.

Pro

True color and Smooth font

Konsole supports true color and smooth font. This made konsole more fanstatic than other terminal emulators.

Pro

Helps to identify tabs using custom icons

Users can associate each bookmark or SSH session with a custom icon, thus giving a visual hint to quickly identify a tab when a lot of tabs are open.

Pro

Supports font ligature

Most terminals in Linux don't support font ligature, while many modern fonts such as PragmataPro or Fira Code already have decent coverage of font ligature. Support for font ligature makes user experience and font management much easier (i.e. you don't need to keep two copies of the same font just to use in the console)

Pro

Supports advanced color schemes

In particular solarized.

Cons

Con

Still new

Has no packages for a lot of main distros.

Con

KDE Library dependencies

While not an issue if using KDE, when trying to use this terminal in other desktop environments or window managers, there will be a large amount of dependencies tied to the app, making for a large install size. For those trying to keep their desktop lean, this may be an issue.

Con

Uses a lot of memory

Although it's very fast, konsole has to use a lot of resources in return. It may use up to 30 MB per instance, depending on the number of tabs and the task at hand.

Con

Can mess terminal keybinds

Most the of the time, the terminal keybinds are just ignored to obey the kde keybinds. Can be configured though.

Con

Lack of DECSCUSR support

Konsole don't allow changing the cursor shape with extended DECSCUSR sequences, using instead the temporary-profile hack. This causes pain when working in (neo)vim inside Konsole.

Con

No support for double-width characters

Konsole no supports double width characters. For powerline users, you need to add a space after powerline glyph.